tools/zipalign/ZipEntry.cpp - SHIFTPHONES/android_build - Gitiles

 /*
  * Copyright (C) 2006 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 //
 // Access to entries in a Zip archive.
 //

 #define LOG_TAG "zip"

 #include "ZipEntry.h"
 #include <utils/Log.h>

 #include <stdio.h>
 #include <string.h>
 #include <assert.h>

 using namespace android;

 /*
  * Initialize a new ZipEntry structure from a FILE* positioned at a
  * CentralDirectoryEntry.
  *
  * On exit, the file pointer will be at the start of the next CDE or
  * at the EOCD.
  */
 status_t ZipEntry::initFromCDE(FILE* fp)
 {
     status_t result;
     long posn;
     bool hasDD;

     //ALOGV("initFromCDE ---\n");

     /* read the CDE */
     result = mCDE.read(fp);
     if (result != NO_ERROR) {
         ALOGD("mCDE.read failed\n");
         return result;
     }

     //mCDE.dump();

     /* using the info in the CDE, go load up the LFH */
     posn = ftell(fp);
     if (fseek(fp, mCDE.mLocalHeaderRelOffset, SEEK_SET) != 0) {
         ALOGD("local header seek failed (%ld)\n",
             mCDE.mLocalHeaderRelOffset);
         return UNKNOWN_ERROR;
     }

     result = mLFH.read(fp);
     if (result != NO_ERROR) {
         ALOGD("mLFH.read failed\n");
         return result;
     }

     if (fseek(fp, posn, SEEK_SET) != 0)
         return UNKNOWN_ERROR;

     //mLFH.dump();

     /*
      * We *might* need to read the Data Descriptor at this point and
      * integrate it into the LFH.  If this bit is set, the CRC-32,
      * compressed size, and uncompressed size will be zero.  In practice
      * these seem to be rare.
      */
     hasDD = (mLFH.mGPBitFlag & kUsesDataDescr) != 0;
     if (hasDD) {
         // do something clever
         //ALOGD("+++ has data descriptor\n");
     }

     /*
      * Sanity-check the LFH.  Note that this will fail if the "kUsesDataDescr"
      * flag is set, because the LFH is incomplete.  (Not a problem, since we
      * prefer the CDE values.)
      */
     if (!hasDD && !compareHeaders()) {
         ALOGW("WARNING: header mismatch\n");
         // keep going?
     }

     /*
      * If the mVersionToExtract is greater than 20, we may have an
      * issue unpacking the record -- could be encrypted, compressed
      * with something we don't support, or use Zip64 extensions.  We
      * can defer worrying about that to when we're extracting data.
      */

     return NO_ERROR;
 }

 /*
  * Initialize a new entry.  Pass in the file name and an optional comment.
  *
  * Initializes the CDE and the LFH.
  */
 void ZipEntry::initNew(const char* fileName, const char* comment)
 {
     assert(fileName != NULL && *fileName != '\0');  // name required

     /* most fields are properly initialized by constructor */
     mCDE.mVersionMadeBy = kDefaultMadeBy;
     mCDE.mVersionToExtract = kDefaultVersion;
     mCDE.mCompressionMethod = kCompressStored;
     mCDE.mFileNameLength = strlen(fileName);
     if (comment != NULL)
         mCDE.mFileCommentLength = strlen(comment);
     mCDE.mExternalAttrs = 0x81b60020;   // matches what WinZip does

     if (mCDE.mFileNameLength > 0) {
         mCDE.mFileName = new unsigned char[mCDE.mFileNameLength+1];
         strcpy((char*) mCDE.mFileName, fileName);
     }
     if (mCDE.mFileCommentLength > 0) {
         /* TODO: stop assuming null-terminated ASCII here? */
         mCDE.mFileComment = new unsigned char[mCDE.mFileCommentLength+1];
         strcpy((char*) mCDE.mFileComment, comment);
     }

     copyCDEtoLFH();
 }

 /*
  * Initialize a new entry, starting with the ZipEntry from a different
  * archive.
  *
  * Initializes the CDE and the LFH.
  */
 status_t ZipEntry::initFromExternal(const ZipFile* pZipFile,
     const ZipEntry* pEntry)
 {
     /*
      * Copy everything in the CDE over, then fix up the hairy bits.
      */
     memcpy(&mCDE, &pEntry->mCDE, sizeof(mCDE));

     if (mCDE.mFileNameLength > 0) {
         mCDE.mFileName = new unsigned char[mCDE.mFileNameLength+1];
         if (mCDE.mFileName == NULL)
             return NO_MEMORY;
         strcpy((char*) mCDE.mFileName, (char*)pEntry->mCDE.mFileName);
     }
     if (mCDE.mFileCommentLength > 0) {
         mCDE.mFileComment = new unsigned char[mCDE.mFileCommentLength+1];
         if (mCDE.mFileComment == NULL)
             return NO_MEMORY;
         strcpy((char*) mCDE.mFileComment, (char*)pEntry->mCDE.mFileComment);
     }
     if (mCDE.mExtraFieldLength > 0) {
         /* we null-terminate this, though it may not be a string */
         mCDE.mExtraField = new unsigned char[mCDE.mExtraFieldLength+1];
         if (mCDE.mExtraField == NULL)
             return NO_MEMORY;
         memcpy(mCDE.mExtraField, pEntry->mCDE.mExtraField,
             mCDE.mExtraFieldLength+1);
     }

     /* construct the LFH from the CDE */
     copyCDEtoLFH();

     /*
      * The LFH "extra" field is independent of the CDE "extra", so we
      * handle it here.
      */
     assert(mLFH.mExtraField == NULL);
     mLFH.mExtraFieldLength = pEntry->mLFH.mExtraFieldLength;
     if (mLFH.mExtraFieldLength > 0) {
         mLFH.mExtraField = new unsigned char[mLFH.mExtraFieldLength+1];
         if (mLFH.mExtraField == NULL)
             return NO_MEMORY;
         memcpy(mLFH.mExtraField, pEntry->mLFH.mExtraField,
             mLFH.mExtraFieldLength+1);
     }

     return NO_ERROR;
 }

 /*
  * Insert pad bytes in the LFH by tweaking the "extra" field.  This will
  * potentially confuse something that put "extra" data in here earlier,
  * but I can't find an actual problem.
  */
 status_t ZipEntry::addPadding(int padding)
 {
     if (padding <= 0)
         return INVALID_OPERATION;

     //ALOGI("HEY: adding %d pad bytes to existing %d in %s\n",
     //    padding, mLFH.mExtraFieldLength, mCDE.mFileName);

     if (mLFH.mExtraFieldLength > 0) {
         /* extend existing field */
         unsigned char* newExtra;

         newExtra = new unsigned char[mLFH.mExtraFieldLength + padding];
         if (newExtra == NULL)
             return NO_MEMORY;
         memset(newExtra + mLFH.mExtraFieldLength, 0, padding);
         memcpy(newExtra, mLFH.mExtraField, mLFH.mExtraFieldLength);

         delete[] mLFH.mExtraField;
         mLFH.mExtraField = newExtra;
         mLFH.mExtraFieldLength += padding;
     } else {
         /* create new field */
         mLFH.mExtraField = new unsigned char[padding];
         memset(mLFH.mExtraField, 0, padding);
         mLFH.mExtraFieldLength = padding;
     }

     return NO_ERROR;
 }

 /*
  * Set the fields in the LFH equal to the corresponding fields in the CDE.
  *
  * This does not touch the LFH "extra" field.
  */
 void ZipEntry::copyCDEtoLFH(void)
 {
     mLFH.mVersionToExtract  = mCDE.mVersionToExtract;
     mLFH.mGPBitFlag         = mCDE.mGPBitFlag;
     mLFH.mCompressionMethod = mCDE.mCompressionMethod;
     mLFH.mLastModFileTime   = mCDE.mLastModFileTime;
     mLFH.mLastModFileDate   = mCDE.mLastModFileDate;
     mLFH.mCRC32             = mCDE.mCRC32;
     mLFH.mCompressedSize    = mCDE.mCompressedSize;
     mLFH.mUncompressedSize  = mCDE.mUncompressedSize;
     mLFH.mFileNameLength    = mCDE.mFileNameLength;
     // the "extra field" is independent

     delete[] mLFH.mFileName;
     if (mLFH.mFileNameLength > 0) {
         mLFH.mFileName = new unsigned char[mLFH.mFileNameLength+1];
         strcpy((char*) mLFH.mFileName, (const char*) mCDE.mFileName);
     } else {
         mLFH.mFileName = NULL;
     }
 }

 /*
  * Set some information about a file after we add it.
  */
 void ZipEntry::setDataInfo(long uncompLen, long compLen, unsigned long crc32,
     int compressionMethod)
 {
     mCDE.mCompressionMethod = compressionMethod;
     mCDE.mCRC32 = crc32;
     mCDE.mCompressedSize = compLen;
     mCDE.mUncompressedSize = uncompLen;
     mCDE.mCompressionMethod = compressionMethod;
     if (compressionMethod == kCompressDeflated) {
         mCDE.mGPBitFlag |= 0x0002;      // indicates maximum compression used
     }
     copyCDEtoLFH();
 }

 /*
  * See if the data in mCDE and mLFH match up.  This is mostly useful for
  * debugging these classes, but it can be used to identify damaged
  * archives.
  *
  * Returns "false" if they differ.
  */
 bool ZipEntry::compareHeaders(void) const
 {
     if (mCDE.mVersionToExtract != mLFH.mVersionToExtract) {
         ALOGV("cmp: VersionToExtract\n");
         return false;
     }
     if (mCDE.mGPBitFlag != mLFH.mGPBitFlag) {
         ALOGV("cmp: GPBitFlag\n");
         return false;
     }
     if (mCDE.mCompressionMethod != mLFH.mCompressionMethod) {
         ALOGV("cmp: CompressionMethod\n");
         return false;
     }
     if (mCDE.mLastModFileTime != mLFH.mLastModFileTime) {
         ALOGV("cmp: LastModFileTime\n");
         return false;
     }
     if (mCDE.mLastModFileDate != mLFH.mLastModFileDate) {
         ALOGV("cmp: LastModFileDate\n");
         return false;
     }
     if (mCDE.mCRC32 != mLFH.mCRC32) {
         ALOGV("cmp: CRC32\n");
         return false;
     }
     if (mCDE.mCompressedSize != mLFH.mCompressedSize) {
         ALOGV("cmp: CompressedSize\n");
         return false;
     }
     if (mCDE.mUncompressedSize != mLFH.mUncompressedSize) {
         ALOGV("cmp: UncompressedSize\n");
         return false;
     }
     if (mCDE.mFileNameLength != mLFH.mFileNameLength) {
         ALOGV("cmp: FileNameLength\n");
         return false;
     }
 #if 0       // this seems to be used for padding, not real data
     if (mCDE.mExtraFieldLength != mLFH.mExtraFieldLength) {
         ALOGV("cmp: ExtraFieldLength\n");
         return false;
     }
 #endif
     if (mCDE.mFileName != NULL) {
         if (strcmp((char*) mCDE.mFileName, (char*) mLFH.mFileName) != 0) {
             ALOGV("cmp: FileName\n");
             return false;
         }
     }

     return true;
 }


 /*
  * Convert the DOS date/time stamp into a UNIX time stamp.
  */
 time_t ZipEntry::getModWhen(void) const
 {
     struct tm parts;

     parts.tm_sec = (mCDE.mLastModFileTime & 0x001f) << 1;
     parts.tm_min = (mCDE.mLastModFileTime & 0x07e0) >> 5;
     parts.tm_hour = (mCDE.mLastModFileTime & 0xf800) >> 11;
     parts.tm_mday = (mCDE.mLastModFileDate & 0x001f);
     parts.tm_mon = ((mCDE.mLastModFileDate & 0x01e0) >> 5) -1;
     parts.tm_year = ((mCDE.mLastModFileDate & 0xfe00) >> 9) + 80;
     parts.tm_wday = parts.tm_yday = 0;
     parts.tm_isdst = -1;        // DST info "not available"

     return mktime(&parts);
 }

 /*
  * Set the CDE/LFH timestamp from UNIX time.
  */
 void ZipEntry::setModWhen(time_t when)
 {
 #ifdef HAVE_LOCALTIME_R
     struct tm tmResult;
 #endif
     time_t even;
     unsigned short zdate, ztime;

     struct tm* ptm;

     /* round up to an even number of seconds */
     even = (time_t)(((unsigned long)(when) + 1) & (~1));

     /* expand */
 #ifdef HAVE_LOCALTIME_R
     ptm = localtime_r(&even, &tmResult);
 #else
     ptm = localtime(&even);
 #endif

     int year;
     year = ptm->tm_year;
     if (year < 80)
         year = 80;

     zdate = (year - 80) << 9 | (ptm->tm_mon+1) << 5 | ptm->tm_mday;
     ztime = ptm->tm_hour << 11 | ptm->tm_min << 5 | ptm->tm_sec >> 1;

     mCDE.mLastModFileTime = mLFH.mLastModFileTime = ztime;
     mCDE.mLastModFileDate = mLFH.mLastModFileDate = zdate;
 }


 /*
  * ===========================================================================
  *      ZipEntry::LocalFileHeader
  * ===========================================================================
  */

 /*
  * Read a local file header.
  *
  * On entry, "fp" points to the signature at the start of the header.
  * On exit, "fp" points to the start of data.
  */
 status_t ZipEntry::LocalFileHeader::read(FILE* fp)
 {
     status_t result = NO_ERROR;
     unsigned char buf[kLFHLen];

     assert(mFileName == NULL);
     assert(mExtraField == NULL);

     if (fread(buf, 1, kLFHLen, fp) != kLFHLen) {
         result = UNKNOWN_ERROR;
         goto bail;
     }

     if (ZipEntry::getLongLE(&buf[0x00]) != kSignature) {
         ALOGD("whoops: didn't find expected signature\n");
         result = UNKNOWN_ERROR;
         goto bail;
     }

     mVersionToExtract = ZipEntry::getShortLE(&buf[0x04]);
     mGPBitFlag = ZipEntry::getShortLE(&buf[0x06]);
     mCompressionMethod = ZipEntry::getShortLE(&buf[0x08]);
     mLastModFileTime = ZipEntry::getShortLE(&buf[0x0a]);
     mLastModFileDate = ZipEntry::getShortLE(&buf[0x0c]);
     mCRC32 = ZipEntry::getLongLE(&buf[0x0e]);
     mCompressedSize = ZipEntry::getLongLE(&buf[0x12]);
     mUncompressedSize = ZipEntry::getLongLE(&buf[0x16]);
     mFileNameLength = ZipEntry::getShortLE(&buf[0x1a]);
     mExtraFieldLength = ZipEntry::getShortLE(&buf[0x1c]);

     // TODO: validate sizes

     /* grab filename */
     if (mFileNameLength != 0) {
         mFileName = new unsigned char[mFileNameLength+1];
         if (mFileName == NULL) {
             result = NO_MEMORY;
             goto bail;
         }
         if (fread(mFileName, 1, mFileNameLength, fp) != mFileNameLength) {
             result = UNKNOWN_ERROR;
             goto bail;
         }
         mFileName[mFileNameLength] = '\0';
     }

     /* grab extra field */
     if (mExtraFieldLength != 0) {
         mExtraField = new unsigned char[mExtraFieldLength+1];
         if (mExtraField == NULL) {
             result = NO_MEMORY;
             goto bail;
         }
         if (fread(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength) {
             result = UNKNOWN_ERROR;
             goto bail;
         }
         mExtraField[mExtraFieldLength] = '\0';
     }

 bail:
     return result;
 }

 /*
  * Write a local file header.
  */
 status_t ZipEntry::LocalFileHeader::write(FILE* fp)
 {
     unsigned char buf[kLFHLen];

     ZipEntry::putLongLE(&buf[0x00], kSignature);
     ZipEntry::putShortLE(&buf[0x04], mVersionToExtract);
     ZipEntry::putShortLE(&buf[0x06], mGPBitFlag);
     ZipEntry::putShortLE(&buf[0x08], mCompressionMethod);
     ZipEntry::putShortLE(&buf[0x0a], mLastModFileTime);
     ZipEntry::putShortLE(&buf[0x0c], mLastModFileDate);
     ZipEntry::putLongLE(&buf[0x0e], mCRC32);
     ZipEntry::putLongLE(&buf[0x12], mCompressedSize);
     ZipEntry::putLongLE(&buf[0x16], mUncompressedSize);
     ZipEntry::putShortLE(&buf[0x1a], mFileNameLength);
     ZipEntry::putShortLE(&buf[0x1c], mExtraFieldLength);

     if (fwrite(buf, 1, kLFHLen, fp) != kLFHLen)
         return UNKNOWN_ERROR;

     /* write filename */
     if (mFileNameLength != 0) {
         if (fwrite(mFileName, 1, mFileNameLength, fp) != mFileNameLength)
             return UNKNOWN_ERROR;
     }

     /* write "extra field" */
     if (mExtraFieldLength != 0) {
         if (fwrite(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength)
             return UNKNOWN_ERROR;
     }

     return NO_ERROR;
 }


 /*
  * Dump the contents of a LocalFileHeader object.
  */
 void ZipEntry::LocalFileHeader::dump(void) const
 {
     ALOGD(" LocalFileHeader contents:\n");
     ALOGD("  versToExt=%u gpBits=0x%04x compression=%u\n",
         mVersionToExtract, mGPBitFlag, mCompressionMethod);
     ALOGD("  modTime=0x%04x modDate=0x%04x crc32=0x%08lx\n",
         mLastModFileTime, mLastModFileDate, mCRC32);
     ALOGD("  compressedSize=%lu uncompressedSize=%lu\n",
         mCompressedSize, mUncompressedSize);
     ALOGD("  filenameLen=%u extraLen=%u\n",
         mFileNameLength, mExtraFieldLength);
     if (mFileName != NULL)
         ALOGD("  filename: '%s'\n", mFileName);
 }


 /*
  * ===========================================================================
  *      ZipEntry::CentralDirEntry
  * ===========================================================================
  */

 /*
  * Read the central dir entry that appears next in the file.
  *
  * On entry, "fp" should be positioned on the signature bytes for the
  * entry.  On exit, "fp" will point at the signature word for the next
  * entry or for the EOCD.
  */
 status_t ZipEntry::CentralDirEntry::read(FILE* fp)
 {
     status_t result = NO_ERROR;
     unsigned char buf[kCDELen];

     /* no re-use */
     assert(mFileName == NULL);
     assert(mExtraField == NULL);
     assert(mFileComment == NULL);

     if (fread(buf, 1, kCDELen, fp) != kCDELen) {
         result = UNKNOWN_ERROR;
         goto bail;
     }

     if (ZipEntry::getLongLE(&buf[0x00]) != kSignature) {
         ALOGD("Whoops: didn't find expected signature\n");
         result = UNKNOWN_ERROR;
         goto bail;
     }

     mVersionMadeBy = ZipEntry::getShortLE(&buf[0x04]);
     mVersionToExtract = ZipEntry::getShortLE(&buf[0x06]);
     mGPBitFlag = ZipEntry::getShortLE(&buf[0x08]);
     mCompressionMethod = ZipEntry::getShortLE(&buf[0x0a]);
     mLastModFileTime = ZipEntry::getShortLE(&buf[0x0c]);
     mLastModFileDate = ZipEntry::getShortLE(&buf[0x0e]);
     mCRC32 = ZipEntry::getLongLE(&buf[0x10]);
     mCompressedSize = ZipEntry::getLongLE(&buf[0x14]);
     mUncompressedSize = ZipEntry::getLongLE(&buf[0x18]);
     mFileNameLength = ZipEntry::getShortLE(&buf[0x1c]);
     mExtraFieldLength = ZipEntry::getShortLE(&buf[0x1e]);
     mFileCommentLength = ZipEntry::getShortLE(&buf[0x20]);
     mDiskNumberStart = ZipEntry::getShortLE(&buf[0x22]);
     mInternalAttrs = ZipEntry::getShortLE(&buf[0x24]);
     mExternalAttrs = ZipEntry::getLongLE(&buf[0x26]);
     mLocalHeaderRelOffset = ZipEntry::getLongLE(&buf[0x2a]);

     // TODO: validate sizes and offsets

     /* grab filename */
     if (mFileNameLength != 0) {
         mFileName = new unsigned char[mFileNameLength+1];
         if (mFileName == NULL) {
             result = NO_MEMORY;
             goto bail;
         }
         if (fread(mFileName, 1, mFileNameLength, fp) != mFileNameLength) {
             result = UNKNOWN_ERROR;
             goto bail;
         }
         mFileName[mFileNameLength] = '\0';
     }

     /* read "extra field" */
     if (mExtraFieldLength != 0) {
         mExtraField = new unsigned char[mExtraFieldLength+1];
         if (mExtraField == NULL) {
             result = NO_MEMORY;
             goto bail;
         }
         if (fread(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength) {
             result = UNKNOWN_ERROR;
             goto bail;
         }
         mExtraField[mExtraFieldLength] = '\0';
     }


     /* grab comment, if any */
     if (mFileCommentLength != 0) {
         mFileComment = new unsigned char[mFileCommentLength+1];
         if (mFileComment == NULL) {
             result = NO_MEMORY;
             goto bail;
         }
         if (fread(mFileComment, 1, mFileCommentLength, fp) != mFileCommentLength)
         {
             result = UNKNOWN_ERROR;
             goto bail;
         }
         mFileComment[mFileCommentLength] = '\0';
     }

 bail:
     return result;
 }

 /*
  * Write a central dir entry.
  */
 status_t ZipEntry::CentralDirEntry::write(FILE* fp)
 {
     unsigned char buf[kCDELen];

     ZipEntry::putLongLE(&buf[0x00], kSignature);
     ZipEntry::putShortLE(&buf[0x04], mVersionMadeBy);
     ZipEntry::putShortLE(&buf[0x06], mVersionToExtract);
     ZipEntry::putShortLE(&buf[0x08], mGPBitFlag);
     ZipEntry::putShortLE(&buf[0x0a], mCompressionMethod);
     ZipEntry::putShortLE(&buf[0x0c], mLastModFileTime);
     ZipEntry::putShortLE(&buf[0x0e], mLastModFileDate);
     ZipEntry::putLongLE(&buf[0x10], mCRC32);
     ZipEntry::putLongLE(&buf[0x14], mCompressedSize);
     ZipEntry::putLongLE(&buf[0x18], mUncompressedSize);
     ZipEntry::putShortLE(&buf[0x1c], mFileNameLength);
     ZipEntry::putShortLE(&buf[0x1e], mExtraFieldLength);
     ZipEntry::putShortLE(&buf[0x20], mFileCommentLength);
     ZipEntry::putShortLE(&buf[0x22], mDiskNumberStart);
     ZipEntry::putShortLE(&buf[0x24], mInternalAttrs);
     ZipEntry::putLongLE(&buf[0x26], mExternalAttrs);
     ZipEntry::putLongLE(&buf[0x2a], mLocalHeaderRelOffset);

     if (fwrite(buf, 1, kCDELen, fp) != kCDELen)
         return UNKNOWN_ERROR;

     /* write filename */
     if (mFileNameLength != 0) {
         if (fwrite(mFileName, 1, mFileNameLength, fp) != mFileNameLength)
             return UNKNOWN_ERROR;
     }

     /* write "extra field" */
     if (mExtraFieldLength != 0) {
         if (fwrite(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength)
             return UNKNOWN_ERROR;
     }

     /* write comment */
     if (mFileCommentLength != 0) {
         if (fwrite(mFileComment, 1, mFileCommentLength, fp) != mFileCommentLength)
             return UNKNOWN_ERROR;
     }

     return NO_ERROR;
 }

 /*
  * Dump the contents of a CentralDirEntry object.
  */
 void ZipEntry::CentralDirEntry::dump(void) const
 {
     ALOGD(" CentralDirEntry contents:\n");
     ALOGD("  versMadeBy=%u versToExt=%u gpBits=0x%04x compression=%u\n",
         mVersionMadeBy, mVersionToExtract, mGPBitFlag, mCompressionMethod);
     ALOGD("  modTime=0x%04x modDate=0x%04x crc32=0x%08lx\n",
         mLastModFileTime, mLastModFileDate, mCRC32);
     ALOGD("  compressedSize=%lu uncompressedSize=%lu\n",
         mCompressedSize, mUncompressedSize);
     ALOGD("  filenameLen=%u extraLen=%u commentLen=%u\n",
         mFileNameLength, mExtraFieldLength, mFileCommentLength);
     ALOGD("  diskNumStart=%u intAttr=0x%04x extAttr=0x%08lx relOffset=%lu\n",
         mDiskNumberStart, mInternalAttrs, mExternalAttrs,
         mLocalHeaderRelOffset);

     if (mFileName != NULL)
         ALOGD("  filename: '%s'\n", mFileName);
     if (mFileComment != NULL)
         ALOGD("  comment: '%s'\n", mFileComment);
 }
	/*
	* Copyright (C) 2006 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	//
	// Access to entries in a Zip archive.
	//

	#define LOG_TAG "zip"

	#include "ZipEntry.h"
	#include <utils/Log.h>

	#include <stdio.h>
	#include <string.h>
	#include <assert.h>

	using namespace android;

	/*
	* Initialize a new ZipEntry structure from a FILE* positioned at a
	* CentralDirectoryEntry.
	*
	* On exit, the file pointer will be at the start of the next CDE or
	* at the EOCD.
	*/
	status_t ZipEntry::initFromCDE(FILE* fp)
	{
	status_t result;
	long posn;
	bool hasDD;

	//ALOGV("initFromCDE ---\n");

	/* read the CDE */
	result = mCDE.read(fp);
	if (result != NO_ERROR) {
	ALOGD("mCDE.read failed\n");
	return result;
	}

	//mCDE.dump();

	/* using the info in the CDE, go load up the LFH */
	posn = ftell(fp);
	if (fseek(fp, mCDE.mLocalHeaderRelOffset, SEEK_SET) != 0) {
	ALOGD("local header seek failed (%ld)\n",
	mCDE.mLocalHeaderRelOffset);
	return UNKNOWN_ERROR;
	}

	result = mLFH.read(fp);
	if (result != NO_ERROR) {
	ALOGD("mLFH.read failed\n");
	return result;
	}

	if (fseek(fp, posn, SEEK_SET) != 0)
	return UNKNOWN_ERROR;

	//mLFH.dump();

	/*
	* We might need to read the Data Descriptor at this point and
	* integrate it into the LFH. If this bit is set, the CRC-32,
	* compressed size, and uncompressed size will be zero. In practice
	* these seem to be rare.
	*/
	hasDD = (mLFH.mGPBitFlag & kUsesDataDescr) != 0;
	if (hasDD) {
	// do something clever
	//ALOGD("+++ has data descriptor\n");
	}

	/*
	* Sanity-check the LFH. Note that this will fail if the "kUsesDataDescr"
	* flag is set, because the LFH is incomplete. (Not a problem, since we
	* prefer the CDE values.)
	*/
	if (!hasDD && !compareHeaders()) {
	ALOGW("WARNING: header mismatch\n");
	// keep going?
	}

	/*
	* If the mVersionToExtract is greater than 20, we may have an
	* issue unpacking the record -- could be encrypted, compressed
	* with something we don't support, or use Zip64 extensions. We
	* can defer worrying about that to when we're extracting data.
	*/

	return NO_ERROR;
	}

	/*
	* Initialize a new entry. Pass in the file name and an optional comment.
	*
	* Initializes the CDE and the LFH.
	*/
	void ZipEntry::initNew(const char* fileName, const char* comment)
	{
	assert(fileName != NULL && *fileName != '\0'); // name required

	/* most fields are properly initialized by constructor */
	mCDE.mVersionMadeBy = kDefaultMadeBy;
	mCDE.mVersionToExtract = kDefaultVersion;
	mCDE.mCompressionMethod = kCompressStored;
	mCDE.mFileNameLength = strlen(fileName);
	if (comment != NULL)
	mCDE.mFileCommentLength = strlen(comment);
	mCDE.mExternalAttrs = 0x81b60020; // matches what WinZip does

	if (mCDE.mFileNameLength > 0) {
	mCDE.mFileName = new unsigned char[mCDE.mFileNameLength+1];
	strcpy((char*) mCDE.mFileName, fileName);
	}
	if (mCDE.mFileCommentLength > 0) {
	/* TODO: stop assuming null-terminated ASCII here? */
	mCDE.mFileComment = new unsigned char[mCDE.mFileCommentLength+1];
	strcpy((char*) mCDE.mFileComment, comment);
	}

	copyCDEtoLFH();
	}

	/*
	* Initialize a new entry, starting with the ZipEntry from a different
	* archive.
	*
	* Initializes the CDE and the LFH.
	*/
	status_t ZipEntry::initFromExternal(const ZipFile* pZipFile,
	const ZipEntry* pEntry)
	{
	/*
	* Copy everything in the CDE over, then fix up the hairy bits.
	*/
	memcpy(&mCDE, &pEntry->mCDE, sizeof(mCDE));

	if (mCDE.mFileNameLength > 0) {
	mCDE.mFileName = new unsigned char[mCDE.mFileNameLength+1];
	if (mCDE.mFileName == NULL)
	return NO_MEMORY;
	strcpy((char) mCDE.mFileName, (char)pEntry->mCDE.mFileName);
	}
	if (mCDE.mFileCommentLength > 0) {
	mCDE.mFileComment = new unsigned char[mCDE.mFileCommentLength+1];
	if (mCDE.mFileComment == NULL)
	return NO_MEMORY;
	strcpy((char) mCDE.mFileComment, (char)pEntry->mCDE.mFileComment);
	}
	if (mCDE.mExtraFieldLength > 0) {
	/* we null-terminate this, though it may not be a string */
	mCDE.mExtraField = new unsigned char[mCDE.mExtraFieldLength+1];
	if (mCDE.mExtraField == NULL)
	return NO_MEMORY;
	memcpy(mCDE.mExtraField, pEntry->mCDE.mExtraField,
	mCDE.mExtraFieldLength+1);
	}

	/* construct the LFH from the CDE */
	copyCDEtoLFH();

	/*
	* The LFH "extra" field is independent of the CDE "extra", so we
	* handle it here.
	*/
	assert(mLFH.mExtraField == NULL);
	mLFH.mExtraFieldLength = pEntry->mLFH.mExtraFieldLength;
	if (mLFH.mExtraFieldLength > 0) {
	mLFH.mExtraField = new unsigned char[mLFH.mExtraFieldLength+1];
	if (mLFH.mExtraField == NULL)
	return NO_MEMORY;
	memcpy(mLFH.mExtraField, pEntry->mLFH.mExtraField,
	mLFH.mExtraFieldLength+1);
	}

	return NO_ERROR;
	}

	/*
	* Insert pad bytes in the LFH by tweaking the "extra" field. This will
	* potentially confuse something that put "extra" data in here earlier,
	* but I can't find an actual problem.
	*/
	status_t ZipEntry::addPadding(int padding)
	{
	if (padding <= 0)
	return INVALID_OPERATION;

	//ALOGI("HEY: adding %d pad bytes to existing %d in %s\n",
	// padding, mLFH.mExtraFieldLength, mCDE.mFileName);

	if (mLFH.mExtraFieldLength > 0) {
	/* extend existing field */
	unsigned char* newExtra;

	newExtra = new unsigned char[mLFH.mExtraFieldLength + padding];
	if (newExtra == NULL)
	return NO_MEMORY;
	memset(newExtra + mLFH.mExtraFieldLength, 0, padding);
	memcpy(newExtra, mLFH.mExtraField, mLFH.mExtraFieldLength);

	delete[] mLFH.mExtraField;
	mLFH.mExtraField = newExtra;
	mLFH.mExtraFieldLength += padding;
	} else {
	/* create new field */
	mLFH.mExtraField = new unsigned char[padding];
	memset(mLFH.mExtraField, 0, padding);
	mLFH.mExtraFieldLength = padding;
	}

	return NO_ERROR;
	}

	/*
	* Set the fields in the LFH equal to the corresponding fields in the CDE.
	*
	* This does not touch the LFH "extra" field.
	*/
	void ZipEntry::copyCDEtoLFH(void)
	{
	mLFH.mVersionToExtract = mCDE.mVersionToExtract;
	mLFH.mGPBitFlag = mCDE.mGPBitFlag;
	mLFH.mCompressionMethod = mCDE.mCompressionMethod;
	mLFH.mLastModFileTime = mCDE.mLastModFileTime;
	mLFH.mLastModFileDate = mCDE.mLastModFileDate;
	mLFH.mCRC32 = mCDE.mCRC32;
	mLFH.mCompressedSize = mCDE.mCompressedSize;
	mLFH.mUncompressedSize = mCDE.mUncompressedSize;
	mLFH.mFileNameLength = mCDE.mFileNameLength;
	// the "extra field" is independent

	delete[] mLFH.mFileName;
	if (mLFH.mFileNameLength > 0) {
	mLFH.mFileName = new unsigned char[mLFH.mFileNameLength+1];
	strcpy((char) mLFH.mFileName, (const char) mCDE.mFileName);
	} else {
	mLFH.mFileName = NULL;
	}
	}

	/*
	* Set some information about a file after we add it.
	*/
	void ZipEntry::setDataInfo(long uncompLen, long compLen, unsigned long crc32,
	int compressionMethod)
	{
	mCDE.mCompressionMethod = compressionMethod;
	mCDE.mCRC32 = crc32;
	mCDE.mCompressedSize = compLen;
	mCDE.mUncompressedSize = uncompLen;
	mCDE.mCompressionMethod = compressionMethod;
	if (compressionMethod == kCompressDeflated) {
	mCDE.mGPBitFlag \|= 0x0002; // indicates maximum compression used
	}
	copyCDEtoLFH();
	}

	/*
	* See if the data in mCDE and mLFH match up. This is mostly useful for
	* debugging these classes, but it can be used to identify damaged
	* archives.
	*
	* Returns "false" if they differ.
	*/
	bool ZipEntry::compareHeaders(void) const
	{
	if (mCDE.mVersionToExtract != mLFH.mVersionToExtract) {
	ALOGV("cmp: VersionToExtract\n");
	return false;
	}
	if (mCDE.mGPBitFlag != mLFH.mGPBitFlag) {
	ALOGV("cmp: GPBitFlag\n");
	return false;
	}
	if (mCDE.mCompressionMethod != mLFH.mCompressionMethod) {
	ALOGV("cmp: CompressionMethod\n");
	return false;
	}
	if (mCDE.mLastModFileTime != mLFH.mLastModFileTime) {
	ALOGV("cmp: LastModFileTime\n");
	return false;
	}
	if (mCDE.mLastModFileDate != mLFH.mLastModFileDate) {
	ALOGV("cmp: LastModFileDate\n");
	return false;
	}
	if (mCDE.mCRC32 != mLFH.mCRC32) {
	ALOGV("cmp: CRC32\n");
	return false;
	}
	if (mCDE.mCompressedSize != mLFH.mCompressedSize) {
	ALOGV("cmp: CompressedSize\n");
	return false;
	}
	if (mCDE.mUncompressedSize != mLFH.mUncompressedSize) {
	ALOGV("cmp: UncompressedSize\n");
	return false;
	}
	if (mCDE.mFileNameLength != mLFH.mFileNameLength) {
	ALOGV("cmp: FileNameLength\n");
	return false;
	}
	#if 0 // this seems to be used for padding, not real data
	if (mCDE.mExtraFieldLength != mLFH.mExtraFieldLength) {
	ALOGV("cmp: ExtraFieldLength\n");
	return false;
	}
	#endif
	if (mCDE.mFileName != NULL) {
	if (strcmp((char) mCDE.mFileName, (char) mLFH.mFileName) != 0) {
	ALOGV("cmp: FileName\n");
	return false;
	}
	}

	return true;
	}


	/*
	* Convert the DOS date/time stamp into a UNIX time stamp.
	*/
	time_t ZipEntry::getModWhen(void) const
	{
	struct tm parts;

	parts.tm_sec = (mCDE.mLastModFileTime & 0x001f) << 1;
	parts.tm_min = (mCDE.mLastModFileTime & 0x07e0) >> 5;
	parts.tm_hour = (mCDE.mLastModFileTime & 0xf800) >> 11;
	parts.tm_mday = (mCDE.mLastModFileDate & 0x001f);
	parts.tm_mon = ((mCDE.mLastModFileDate & 0x01e0) >> 5) -1;
	parts.tm_year = ((mCDE.mLastModFileDate & 0xfe00) >> 9) + 80;
	parts.tm_wday = parts.tm_yday = 0;
	parts.tm_isdst = -1; // DST info "not available"

	return mktime(&parts);
	}

	/*
	* Set the CDE/LFH timestamp from UNIX time.
	*/
	void ZipEntry::setModWhen(time_t when)
	{
	#ifdef HAVE_LOCALTIME_R
	struct tm tmResult;
	#endif
	time_t even;
	unsigned short zdate, ztime;

	struct tm* ptm;

	/* round up to an even number of seconds */
	even = (time_t)(((unsigned long)(when) + 1) & (~1));

	/* expand */
	#ifdef HAVE_LOCALTIME_R
	ptm = localtime_r(&even, &tmResult);
	#else
	ptm = localtime(&even);
	#endif

	int year;
	year = ptm->tm_year;
	if (year < 80)
	year = 80;

	zdate = (year - 80) << 9 \| (ptm->tm_mon+1) << 5 \| ptm->tm_mday;
	ztime = ptm->tm_hour << 11 \| ptm->tm_min << 5 \| ptm->tm_sec >> 1;

	mCDE.mLastModFileTime = mLFH.mLastModFileTime = ztime;
	mCDE.mLastModFileDate = mLFH.mLastModFileDate = zdate;
	}


	/*
	* ===========================================================================
	* ZipEntry::LocalFileHeader
	* ===========================================================================
	*/

	/*
	* Read a local file header.
	*
	* On entry, "fp" points to the signature at the start of the header.
	* On exit, "fp" points to the start of data.
	*/
	status_t ZipEntry::LocalFileHeader::read(FILE* fp)
	{
	status_t result = NO_ERROR;
	unsigned char buf[kLFHLen];

	assert(mFileName == NULL);
	assert(mExtraField == NULL);

	if (fread(buf, 1, kLFHLen, fp) != kLFHLen) {
	result = UNKNOWN_ERROR;
	goto bail;
	}

	if (ZipEntry::getLongLE(&buf[0x00]) != kSignature) {
	ALOGD("whoops: didn't find expected signature\n");
	result = UNKNOWN_ERROR;
	goto bail;
	}

	mVersionToExtract = ZipEntry::getShortLE(&buf[0x04]);
	mGPBitFlag = ZipEntry::getShortLE(&buf[0x06]);
	mCompressionMethod = ZipEntry::getShortLE(&buf[0x08]);
	mLastModFileTime = ZipEntry::getShortLE(&buf[0x0a]);
	mLastModFileDate = ZipEntry::getShortLE(&buf[0x0c]);
	mCRC32 = ZipEntry::getLongLE(&buf[0x0e]);
	mCompressedSize = ZipEntry::getLongLE(&buf[0x12]);
	mUncompressedSize = ZipEntry::getLongLE(&buf[0x16]);
	mFileNameLength = ZipEntry::getShortLE(&buf[0x1a]);
	mExtraFieldLength = ZipEntry::getShortLE(&buf[0x1c]);

	// TODO: validate sizes

	/* grab filename */
	if (mFileNameLength != 0) {
	mFileName = new unsigned char[mFileNameLength+1];
	if (mFileName == NULL) {
	result = NO_MEMORY;
	goto bail;
	}
	if (fread(mFileName, 1, mFileNameLength, fp) != mFileNameLength) {
	result = UNKNOWN_ERROR;
	goto bail;
	}
	mFileName[mFileNameLength] = '\0';
	}

	/* grab extra field */
	if (mExtraFieldLength != 0) {
	mExtraField = new unsigned char[mExtraFieldLength+1];
	if (mExtraField == NULL) {
	result = NO_MEMORY;
	goto bail;
	}
	if (fread(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength) {
	result = UNKNOWN_ERROR;
	goto bail;
	}
	mExtraField[mExtraFieldLength] = '\0';
	}

	bail:
	return result;
	}

	/*
	* Write a local file header.
	*/
	status_t ZipEntry::LocalFileHeader::write(FILE* fp)
	{
	unsigned char buf[kLFHLen];

	ZipEntry::putLongLE(&buf[0x00], kSignature);
	ZipEntry::putShortLE(&buf[0x04], mVersionToExtract);
	ZipEntry::putShortLE(&buf[0x06], mGPBitFlag);
	ZipEntry::putShortLE(&buf[0x08], mCompressionMethod);
	ZipEntry::putShortLE(&buf[0x0a], mLastModFileTime);
	ZipEntry::putShortLE(&buf[0x0c], mLastModFileDate);
	ZipEntry::putLongLE(&buf[0x0e], mCRC32);
	ZipEntry::putLongLE(&buf[0x12], mCompressedSize);
	ZipEntry::putLongLE(&buf[0x16], mUncompressedSize);
	ZipEntry::putShortLE(&buf[0x1a], mFileNameLength);
	ZipEntry::putShortLE(&buf[0x1c], mExtraFieldLength);

	if (fwrite(buf, 1, kLFHLen, fp) != kLFHLen)
	return UNKNOWN_ERROR;

	/* write filename */
	if (mFileNameLength != 0) {
	if (fwrite(mFileName, 1, mFileNameLength, fp) != mFileNameLength)
	return UNKNOWN_ERROR;
	}

	/* write "extra field" */
	if (mExtraFieldLength != 0) {
	if (fwrite(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength)
	return UNKNOWN_ERROR;
	}

	return NO_ERROR;
	}


	/*
	* Dump the contents of a LocalFileHeader object.
	*/
	void ZipEntry::LocalFileHeader::dump(void) const
	{
	ALOGD(" LocalFileHeader contents:\n");
	ALOGD(" versToExt=%u gpBits=0x%04x compression=%u\n",
	mVersionToExtract, mGPBitFlag, mCompressionMethod);
	ALOGD(" modTime=0x%04x modDate=0x%04x crc32=0x%08lx\n",
	mLastModFileTime, mLastModFileDate, mCRC32);
	ALOGD(" compressedSize=%lu uncompressedSize=%lu\n",
	mCompressedSize, mUncompressedSize);
	ALOGD(" filenameLen=%u extraLen=%u\n",
	mFileNameLength, mExtraFieldLength);
	if (mFileName != NULL)
	ALOGD(" filename: '%s'\n", mFileName);
	}


	/*
	* ===========================================================================
	* ZipEntry::CentralDirEntry
	* ===========================================================================
	*/

	/*
	* Read the central dir entry that appears next in the file.
	*
	* On entry, "fp" should be positioned on the signature bytes for the
	* entry. On exit, "fp" will point at the signature word for the next
	* entry or for the EOCD.
	*/
	status_t ZipEntry::CentralDirEntry::read(FILE* fp)
	{
	status_t result = NO_ERROR;
	unsigned char buf[kCDELen];

	/* no re-use */
	assert(mFileName == NULL);
	assert(mExtraField == NULL);
	assert(mFileComment == NULL);

	if (fread(buf, 1, kCDELen, fp) != kCDELen) {
	result = UNKNOWN_ERROR;
	goto bail;
	}

	if (ZipEntry::getLongLE(&buf[0x00]) != kSignature) {
	ALOGD("Whoops: didn't find expected signature\n");
	result = UNKNOWN_ERROR;
	goto bail;
	}

	mVersionMadeBy = ZipEntry::getShortLE(&buf[0x04]);
	mVersionToExtract = ZipEntry::getShortLE(&buf[0x06]);
	mGPBitFlag = ZipEntry::getShortLE(&buf[0x08]);
	mCompressionMethod = ZipEntry::getShortLE(&buf[0x0a]);
	mLastModFileTime = ZipEntry::getShortLE(&buf[0x0c]);
	mLastModFileDate = ZipEntry::getShortLE(&buf[0x0e]);
	mCRC32 = ZipEntry::getLongLE(&buf[0x10]);
	mCompressedSize = ZipEntry::getLongLE(&buf[0x14]);
	mUncompressedSize = ZipEntry::getLongLE(&buf[0x18]);
	mFileNameLength = ZipEntry::getShortLE(&buf[0x1c]);
	mExtraFieldLength = ZipEntry::getShortLE(&buf[0x1e]);
	mFileCommentLength = ZipEntry::getShortLE(&buf[0x20]);
	mDiskNumberStart = ZipEntry::getShortLE(&buf[0x22]);
	mInternalAttrs = ZipEntry::getShortLE(&buf[0x24]);
	mExternalAttrs = ZipEntry::getLongLE(&buf[0x26]);
	mLocalHeaderRelOffset = ZipEntry::getLongLE(&buf[0x2a]);

	// TODO: validate sizes and offsets

	/* grab filename */
	if (mFileNameLength != 0) {
	mFileName = new unsigned char[mFileNameLength+1];
	if (mFileName == NULL) {
	result = NO_MEMORY;
	goto bail;
	}
	if (fread(mFileName, 1, mFileNameLength, fp) != mFileNameLength) {
	result = UNKNOWN_ERROR;
	goto bail;
	}
	mFileName[mFileNameLength] = '\0';
	}

	/* read "extra field" */
	if (mExtraFieldLength != 0) {
	mExtraField = new unsigned char[mExtraFieldLength+1];
	if (mExtraField == NULL) {
	result = NO_MEMORY;
	goto bail;
	}
	if (fread(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength) {
	result = UNKNOWN_ERROR;
	goto bail;
	}
	mExtraField[mExtraFieldLength] = '\0';
	}


	/* grab comment, if any */
	if (mFileCommentLength != 0) {
	mFileComment = new unsigned char[mFileCommentLength+1];
	if (mFileComment == NULL) {
	result = NO_MEMORY;
	goto bail;
	}
	if (fread(mFileComment, 1, mFileCommentLength, fp) != mFileCommentLength)
	{
	result = UNKNOWN_ERROR;
	goto bail;
	}
	mFileComment[mFileCommentLength] = '\0';
	}

	bail:
	return result;
	}

	/*
	* Write a central dir entry.
	*/
	status_t ZipEntry::CentralDirEntry::write(FILE* fp)
	{
	unsigned char buf[kCDELen];

	ZipEntry::putLongLE(&buf[0x00], kSignature);
	ZipEntry::putShortLE(&buf[0x04], mVersionMadeBy);
	ZipEntry::putShortLE(&buf[0x06], mVersionToExtract);
	ZipEntry::putShortLE(&buf[0x08], mGPBitFlag);
	ZipEntry::putShortLE(&buf[0x0a], mCompressionMethod);
	ZipEntry::putShortLE(&buf[0x0c], mLastModFileTime);
	ZipEntry::putShortLE(&buf[0x0e], mLastModFileDate);
	ZipEntry::putLongLE(&buf[0x10], mCRC32);
	ZipEntry::putLongLE(&buf[0x14], mCompressedSize);
	ZipEntry::putLongLE(&buf[0x18], mUncompressedSize);
	ZipEntry::putShortLE(&buf[0x1c], mFileNameLength);
	ZipEntry::putShortLE(&buf[0x1e], mExtraFieldLength);
	ZipEntry::putShortLE(&buf[0x20], mFileCommentLength);
	ZipEntry::putShortLE(&buf[0x22], mDiskNumberStart);
	ZipEntry::putShortLE(&buf[0x24], mInternalAttrs);
	ZipEntry::putLongLE(&buf[0x26], mExternalAttrs);
	ZipEntry::putLongLE(&buf[0x2a], mLocalHeaderRelOffset);

	if (fwrite(buf, 1, kCDELen, fp) != kCDELen)
	return UNKNOWN_ERROR;

	/* write filename */
	if (mFileNameLength != 0) {
	if (fwrite(mFileName, 1, mFileNameLength, fp) != mFileNameLength)
	return UNKNOWN_ERROR;
	}

	/* write "extra field" */
	if (mExtraFieldLength != 0) {
	if (fwrite(mExtraField, 1, mExtraFieldLength, fp) != mExtraFieldLength)
	return UNKNOWN_ERROR;
	}

	/* write comment */
	if (mFileCommentLength != 0) {
	if (fwrite(mFileComment, 1, mFileCommentLength, fp) != mFileCommentLength)
	return UNKNOWN_ERROR;
	}

	return NO_ERROR;
	}

	/*
	* Dump the contents of a CentralDirEntry object.
	*/
	void ZipEntry::CentralDirEntry::dump(void) const
	{
	ALOGD(" CentralDirEntry contents:\n");
	ALOGD(" versMadeBy=%u versToExt=%u gpBits=0x%04x compression=%u\n",
	mVersionMadeBy, mVersionToExtract, mGPBitFlag, mCompressionMethod);
	ALOGD(" modTime=0x%04x modDate=0x%04x crc32=0x%08lx\n",
	mLastModFileTime, mLastModFileDate, mCRC32);
	ALOGD(" compressedSize=%lu uncompressedSize=%lu\n",
	mCompressedSize, mUncompressedSize);
	ALOGD(" filenameLen=%u extraLen=%u commentLen=%u\n",
	mFileNameLength, mExtraFieldLength, mFileCommentLength);
	ALOGD(" diskNumStart=%u intAttr=0x%04x extAttr=0x%08lx relOffset=%lu\n",
	mDiskNumberStart, mInternalAttrs, mExternalAttrs,
	mLocalHeaderRelOffset);

	if (mFileName != NULL)
	ALOGD(" filename: '%s'\n", mFileName);
	if (mFileComment != NULL)
	ALOGD(" comment: '%s'\n", mFileComment);
	}